Magnificent Popup Gallery images not switching?

Question

Gallery

There is a gallery on the WordPress site, made with the help of Magnificent Popup Gallery

// Modal popup$(function () {
jQuery(document).ready(function($){
    $('.portfolio-item').magnificPopup({
    type: 'image',
    closeOnContentClick: true,
    image: {
      verticalFit: false
    }
  });

/* });
jQuery(document).ready(function($){*/
  $('.sotrudnik-wrap').magnificPopup({
      delegate: 'a', // the selector for gallery item
    type: 'image',
    closeOnContentClick: true,
    gallery: {
      enabled:true
    }
  });
});

put on

<div class="sotrudnik-wrap row">
            		
                    <?php if ( $sertifikat->have_posts() ) : while ( $sertifikat->have_posts() ) : $sertifikat->the_post(); ?>
                        
                           
                        <?php if ( has_post_thumbnail()) { ?>
                        <a href="<?php if (function_exists('wp_get_attachment_url')) {echo wp_get_attachment_url(get_post_thumbnail_id($post->ID), 'full'); }?>" title="<?php the_title(); ?>" class="col-xs-12 col-sm-6 col-md-3">
                			    <?php the_post_thumbnail('sotrudniki-thumb', ['class' => 'img-responsive']); ?></a>
                		 <?php } ?>
                         
                        
                 
                    <?php endwhile; ?>
                    <?php endif; ?>
                    </div>

But it doesn't work switching between images